JP2007025386A - Case panel and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a case panel in which a display image is kept even in a non-power supply state, and which can be replaced by a user with excellent operability during replacement, and to provide an electronic apparatus using the same. <P>SOLUTION: The case panel 31 is mounted on a main body of the electronic apparatus (mobile telephone set) 20 so as to be removable, and comprises: a display means 310; electrodes on a panel side 334a to 334c; and a drawing signal supply means 330. In the display means 310, an image is drawn by receiving supply of a drawing signal and an image display state is kept even in the non-power supply state. The panel side electrodes 334a to 334c are provided corresponding to body side electrodes of a main body of the electronic apparatus 20. The drawing signal supply means 330 supplies the drawing signal to the display means 310 based on the signal received from the main body via the panel side electrode when mounted on the main body of the electronic apparatus 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic device such as a mobile communication terminal and a housing panel that constitutes at least a part of an outer surface portion of a housing in the electronic device.

Conventionally, as this type of electronic apparatus, a mobile communication terminal (wireless communication apparatus) in which display means capable of maintaining an image display state even in a non-powered state is provided on a casing panel (cover) that constitutes the outer surface of the casing ) Is known (see Patent Document 1). In this mobile communication terminal, it is possible to continue displaying images even when the power is not supplied to the display means of the housing panel.
JP 2001-86213 A

When the outer wall portion of the mobile communication terminal is configured with the predetermined display means, the external design of the mobile communication terminal can be changed or information can be displayed on the outer wall portion by switching the image displayed on the display means. Is possible. Further, the external appearance design and information display after the change can be maintained even in a non-powered state.
However, in the conventional mobile communication terminal, since the casing panel provided with the display means is fixed to the outer wall portion, it is difficult for the user to replace the casing panel. Further, when the casing panel can be replaced, it is inconvenient for the user if the operation for displaying an image on the casing panel after the replacement is troublesome.

  An object of the present invention is to provide a casing panel that allows a user to replace a casing panel that can maintain a display image even in a non-powered state, and that has excellent operability at the time of replacement, and the casing panel. To provide electronic equipment.

In order to achieve the above object, an invention according to claim 1 is a housing panel constituting at least a part of an outer surface portion of a housing in an electronic device, wherein an image is drawn by receiving supply of a drawing signal. Display means for maintaining an image display state even in a non-powered state, a panel-side electrode provided corresponding to a body-side electrode of the main body of the electronic device, and the panel when attached to the main body of the electronic device A drawing signal supply means for supplying a drawing signal to the display means based on a signal received from the main body via a side electrode, and is configured to be detachable from the main body of the electronic device It is.
According to a second aspect of the present invention, there is provided a housing panel according to the first aspect, wherein the housing panel mounted on the main body of the electronic device is locked to the main body, and the housing by the locking means. A lock detection means for detecting the lock of the body panel, and the drawing signal supply means detects the lock of the casing panel mounted on the main body based on the detection result of the lock detection means. When this is done, a drawing signal is supplied to the display means.
According to a third aspect of the present invention, there is provided a housing panel according to the first or second aspect, wherein the housing panel mounted on the main body of the electronic device is locked to the main body, and the lock is released. An unlocking detection means for detecting the image and an image erasure signal for erasing the image displayed on the display means when the unlocking is detected based on the detection result of the unlocking detection means. And an image erasure signal supply means for supplying to the display means.
According to a fourth aspect of the present invention, in the housing panel according to the first, second, or third aspect, the storage panel stores data of an image displayed on the display unit, and the drawing signal supply unit includes the storage unit. A drawing signal generated based on the image data read from the image data is supplied to the display means.
According to a fifth aspect of the present invention, there is provided an electronic apparatus including a casing panel that constitutes at least a part of an outer surface portion of the casing. The casing panel receives an image signal to draw an image. And a display means for maintaining the display state of the image even in a non-powered state and a drawing signal supply means for supplying a drawing signal to the display means, provided corresponding to the panel side electrode of the housing panel. A main body side electrode and a signal for transmitting a signal used for supplying a drawing signal to the display means to the housing panel via the main body side electrode when the housing panel is mounted on the main body of the electronic device. And a transmission unit, and the housing panel is configured to be detachable from the main body of the electronic device.
According to a sixth aspect of the present invention, in the electronic device according to the fifth aspect of the present invention, the electronic device includes an electrode connection detection unit that detects a connection between the main body side electrode and the panel side electrode, and the signal transmission unit includes The signal is transmitted to the casing panel when the connection between the panel side electrode of the casing panel and the main body side electrode is detected based on the detection result of the means.
The invention according to claim 7 is the electronic device according to claim 5, wherein the housing panel mounted on the main body of the electronic device is locked to the main body, and the housing is formed by the locking means. Locking detection means for detecting locking of the panel, and the signal transmission means outputs the signal when the locking of the housing panel is detected based on the detection result of the locking detection means. It transmits to a housing | casing panel, It is characterized by the above-mentioned.
The electronic device according to claim 8 is the electronic device according to claim 5, 6 or 7, wherein locking means for locking the casing panel mounted on the main body of the electronic device to the main body; A lock release detecting means for detecting release, and the signal supply means is displayed on the display means when release of the lock is detected based on a detection result of the lock release detecting means. A signal used to supply an image erasing signal for erasing the image is transmitted to the housing panel.
According to a ninth aspect of the present invention, in the electronic device according to the fifth, sixth, seventh, or eighth aspect, the electronic device includes a storage unit that stores data of an image displayed on the casing panel, and the signal supply unit includes the storage unit. Based on the image data read from the means, a signal used for supplying a drawing signal to the display means is transmitted to the casing panel.

In the case panel according to the first aspect, when the image of the display means provided on the case panel is changed, a drawing signal corresponding to the changed image is supplied to the display means. By drawing the changed image on the display means by this drawing signal, the image on the display means is changed. The display state of the image after the change is maintained even in the non-powered state. Moreover, since the housing | casing panel provided with this display means is detachable with respect to the main body of an electronic device, it can be replaced | exchanged according to a user's request. When the casing panel is mounted on the main body of the electronic device, the panel side electrode of the casing panel and the main body side electrode of the main body of the electronic device are mounted in a corresponding state. When the housing panel is attached to the main body of the electronic device in such a manner as to correspond to each electrode, a predetermined signal is received from the main body of the electronic device via the main body side electrode and the panel side electrode. In response to this signal, a drawing signal is supplied from the drawing signal supply means to the display means, whereby an image is drawn on the display means of the housing panel. As described above, when the electronic device is mounted on the main body of the casing panel, an image is drawn on the display means by supplying a drawing signal to the display means of the casing panel. Therefore, the user's operation for displaying an image on the replaced casing panel can be made unnecessary.
The housing panel may be provided with mounting detection means for detecting mounting of the housing panel on the main body of the electronic device. In this case, when the attachment of the housing panel to the main body of the electronic device is detected, a drawing signal is supplied to the display unit, whereby a predetermined image is displayed on the display unit. Therefore, it is possible to reliably display an image on the housing panel after replacement.
In the case panel according to claim 2, when mounted on the main body of the electronic device, the user locks the main body by operating the locking means. Dropping can be prevented. In addition, when the locking of the casing panel attached to the main body of the electronic device is detected, a drawing signal is supplied to the display unit, whereby a predetermined image is displayed on the display unit. Accordingly, it is possible to reliably display an image on the casing panel after it is confirmed that the replaced casing panel is securely attached so as not to drop out from the main body of the electronic device.
According to another aspect of the housing panel of the present invention, when the release of the locking of the housing panel is detected prior to the removal of the electronic device from the main body, an image erasing signal is supplied to the display device to display on the display device. The image that has been deleted is deleted. Therefore, the image displayed on the housing panel removed from the main body of the electronic device can be surely erased.
In the case panel according to the fourth aspect, image data displayed on the display means is stored in the storage means in advance. When an image is displayed on the display means of the housing panel, a drawing signal generated based on the image data read from the storage means in the housing panel is supplied to the display means, and the predetermined predetermined value is supplied to the display means. An image is displayed. By storing the image data to be displayed on the chassis panel in this manner, the desired image can be reliably displayed on the chassis panel after replacement when the chassis panel is replaced. Can be made.

In the electronic device according to the fifth aspect, when the image of the display means provided on the housing panel attached to the main body is changed, a drawing signal corresponding to the changed image is supplied to the display means. By drawing the changed image on the display means by this drawing signal, the image on the display means is changed. The display state of the image after the change is maintained even in the non-powered state. Moreover, since the housing | casing panel provided with this display means is detachable with respect to the main body of an electronic device, it can be replaced | exchanged according to a user's request. When the casing panel is mounted on the main body of the electronic device, the panel side electrode of the casing panel and the main body side electrode of the main body of the electronic device are mounted in a corresponding state. When the housing panel is attached to the main body of the electronic device in such a manner as to correspond to each electrode, a predetermined signal is received from the main body of the electronic device via the main body side electrode and the panel side electrode. Based on this signal, a drawing signal is supplied from the drawing signal supply means to the display means, whereby an image is drawn on the display means of the housing panel. When the casing panel is thus mounted on the main body of the electronic device, a signal used to supply a drawing signal to the display means is transmitted to the casing panel via the main body side electrode. In the case panel, an image is drawn on the display unit by receiving a signal from the main body and supplying a drawing signal to the display unit. Therefore, the user's operation for displaying an image on the housing panel after replacement is not necessary.
According to another aspect of the electronic apparatus of the present invention, when the housing panel is mounted and the connection between the main body side electrode of the main body and the panel side electrode of the housing panel is detected, a signal used for supplying the drawing signal to the display means is received. Sent to the housing panel. The casing panel receives a signal from the main body and supplies a drawing signal to the display unit, whereby a predetermined image is displayed on the display unit. Therefore, it is possible to reliably display an image on the housing panel after replacement.
In the electronic device according to the seventh aspect, when the casing panel is mounted, the user operates the locking means to be locked to the main body, so that the casing panel mounted on the main body of the electronic device is not dropped. Can be prevented. In addition, when the locking of the casing panel attached to the main body of the electronic device is detected, a signal used for supplying a drawing signal to the display means is transmitted to the casing panel. The casing panel receives a signal from the main body and supplies a drawing signal to the display unit, whereby a predetermined image is displayed on the display unit. Accordingly, it is possible to reliably display an image on the casing panel after it is confirmed that the replaced casing panel is securely attached so as not to drop out from the main body of the electronic device.
In the electronic device according to claim 8, when the release of the locking of the housing panel is detected prior to the removal of the housing panel, the image erasing signal is supplied to the display device and displayed on the display device. The image is erased. Therefore, the image displayed on the housing panel removed from the main body of the electronic device can be surely erased.
In the electronic device according to the ninth aspect, image data to be displayed on the display means is stored in the storage means in advance. When an image is displayed on the display means of the housing panel, a drawing signal generated based on the image data read from the storage means in the electronic device is supplied to the display means, and the predetermined image is displayed on the display means. Is displayed. By storing the image data to be displayed on the housing panel in the electronic device in this way, when the housing panel is replaced, the desired image is reliably displayed on the replaced housing panel. be able to.

The drawing signal supplied to the display means of the casing panel may be generated within the casing panel, or may be generated within the main body of the electronic device and transmitted to the casing panel.
The signal transmitted from the main body of the electronic device to the housing panel may include a signal for supplying power for operating the drawing signal supply means.
In addition, transmission of the signal from the main body of the electronic device to the housing panel may be performed in a contact state in which the main body side electrode of the main body of the electronic device and the panel side electrode provided on the housing panel are in contact with each other. You may carry out in the non-contact state which does not contact both electrodes. When performed in a non-contact manner, it may be performed in a non-contact manner using electromagnetic waves or electromagnetic induction between the main body side electrode and the panel side electrode.

In addition to the mobile communication terminal, the “electronic device” includes any electronic device provided with information storage means, such as a portable information terminal (PDA: Personal Digital Assistance). Further, as the “mobile communication terminal”, mobile phones such as PDC (Personal Digital Cellular) system, GSM (Global System for Mobile Communication) system, TIA (Telecommunications Industry Association) system, IMT (International Mobile Telecommunications) -2000, etc. Mobile phone standardized by TD-SCDMA (MC: Multi Carrier), which is one of TD-SCDMA (Time Division Asynchronous Code Division Multiple Access) methods, PHS (Personal Handyphone System), and the like.
Further, the processing and control in the main body and the housing panel of the electronic device can be realized by executing a predetermined program on a computer provided therein. Delivery of the program used in the computer may be performed using a recording medium such as an FD or a CD-ROM in which the program is recorded as digital information, or may be performed using a communication network such as a computer network.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to maintain even the display state non-powered state of the image displayed on the housing | casing panel which comprises at least one part of the outer surface part of the housing | casing in an electronic device, The housing panel can be replaced by attaching and detaching. In addition, since the user's operation for displaying an image on the housing panel after replacement is unnecessary, there is an effect that the operability at the time of replacement of the housing panel is excellent.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a front view showing an example of the appearance of the mobile phone 20, and FIG. 1B is a rear view of the mobile phone 20. This mobile phone 20 is a clamshell (folding) type mobile phone having a lid portion 29 and a main body portion 30 that can swing relative to each other about a hinge portion. The lid 29 has an open state (the state shown in FIG. 1) in which the keys 21 to 25 of the key operation unit provided in the main body unit 30 can be operated, and a closed state that covers the keys 21 to 25 of the key operation unit. To get. The casing constituting the lid portion 29 in the open state includes a liquid crystal display (LCD) 27, a speaker 28, and the like, which are general power supply image display means that consumes power while the image display state is maintained. Is provided. The casing constituting the outer wall portion of the main body 30 is provided with keys 21 to 25 constituting the key operation portion, a microphone 26, and the like. The key operation unit including these keys 21 to 25 and the normal liquid crystal display (LCD) 27 as the power feeding image display means are on the side facing the user of the casing in the open state that can be operated by the user. It is provided in the outer wall part. Accordingly, the user can operate the keys 21 to 25 of the key operation unit while looking at the screen of the liquid crystal display 27.

Further, the lid 29 which is a part of the main body of the mobile phone 20 is configured such that a housing panel 31 having a non-powered display unit as a non-powered image display means is detachable. As shown in FIG. 1B, the portion of the lid 29 where the housing panel 31 is detachable is an externally exposed portion of the upper casing that is the outer surface of the housing of the lid 29. This externally exposed portion is an outer wall portion (back surface portion) opposite to the outer wall portion (front surface portion) on the LCD 27 side of the two outer surface portions facing the upper casing.
The non-powered display unit is a display unit that draws an image by receiving a drawing signal and maintains the display state of the image even in a non-powered state. The non-powered display unit of the housing panel 31 changes the display image by receiving a drawing drive signal (hereinafter referred to as “drawing signal”) for switching the display image, and changes the display state of the image. It is configured to be maintained even in a non-powered state.
The lid portion 29 is provided with a pair of locking members 291a and 291b as locking means for locking the housing panel 31 mounted on the main body of the lid portion 29 to the main body.

FIGS. 2A to 2C are cross-sectional views showing a state in which the housing panel 31 is removed when the AA cross section of the lid portion 29 of the mobile phone 10 in FIG. . FIGS. 3A to 3C are partial enlarged side views showing a state of removing the housing panel 31 as viewed from the side of the lid portion 29 of the mobile phone 10.
As described above, the locking members 291 a and 291 b provided on the lid 29 are attached so as to be rotatable about the rotation shafts 292 a and 292 b provided on the main body of the lid 29. A claw portion is provided at the tip of each locking member 291a, 291b opposite to the pivot shafts 292a, 292b. The claw portions of the locking members 291a and 291b are provided so as to be fitted into grooves formed on the side end surface of the housing panel 31 attached to the main body of the lid portion 29. 2A and 3A, after the housing panel 31 is mounted on the main body of the lid 29, the locking members 291a and 291b are swung to lock the locking members 291a, 291a, The nail | claw part of 291b and the groove part by the side of a housing panel are fitted. Thereby, the housing panel 31 can be locked to the main body of the lid portion 29. When the housing panel 31 is thus locked to the lid body, the panel-side electrode of the housing panel 31 and the body-side electrode of the body of the lid portion 29 formed to correspond to each other as described later are connected. The

  When removing the housing panel 31 from the main body of the lid portion 29, as shown in FIGS. 2B and 3B, the locking members 291a and 291b are swung outward, and the locking members 291a and 291b are moved. Remove the nail and the groove on the side of the chassis panel. Thereby, the latching of the housing panel 31 with respect to the main body of the cover part 29 can be cancelled | released. After releasing the locking of the housing panel 31 in this way, the housing panel 31 is lifted and separated from the main body of the lid portion 29 as shown in FIGS. The panel 31 can be removed.

  2 and 3, the locking members 291a and 291b on the main body side of the lid portion 29 or the rotation shafts 292a and 292b thereof detect the locking of the housing panel 31 by the locking members 291a and 291b. Locking detecting means is provided. As this locking detection means, a sensor that magnetically or optically detects the rotation of the locking members 291a and 291b can be used. Further, this locking detection means can also be used as locking release detection means for detecting the release of locking of the casing panel 31 by the locking members 291a and 291b.

4A to 4C are partially enlarged side views of the lid portion 29 of the mobile phone 10 according to another configuration example. In this configuration, a set of locking members 320 a as locking means for locking the housing panel 31 mounted on the main body of the lid portion 29 to the main body is provided at the side end of the housing panel 31. . Each locking member 320a provided on the housing panel 31 is attached so as to be rotatable about a rotation shaft 321a provided on the housing panel 31. A claw portion is provided at the tip of each locking member 320a opposite to the rotation shaft 321a. The claw portion of the locking member 320 a is provided so as to be fitted into a groove portion 293 a formed on the surface of the side end portion of the main body of the lid portion 29. 4A, after the housing panel 31 is mounted on the main body of the lid portion 29, the locking member 320a is swung so that the claw portion of the locking member 320a and the groove portion on the housing panel side. 293a is fitted. Thereby, the housing panel 31 can be locked to the main body of the lid portion 29.
When removing the housing panel 31 from the main body of the lid portion 29, as shown in FIG. 4B, the locking member 321a is swung outward, and the claw portion of the locking member 320a and the groove portion 293a on the housing panel side Remove the fitting. Thereby, the latching of the housing panel 31 with respect to the main body of the cover part 29 can be cancelled | released. After unlocking the housing panel 31 in this way, the housing panel 31 can be removed by lifting the housing panel 31 away from the main body of the lid portion 29 as shown in FIG. it can.
In the configuration of FIG. 4, a locking detection means for detecting locking of the housing panel 31 by the locking member 320 a is provided on the rotation shaft 321 a of the locking member 320 a on the housing panel 31 side. As the locking detection means, as described above, a sensor or the like that detects the rotation of the locking member 320a magnetically or optically can be used. Further, this locking detection means can also be used as a locking release detection means for detecting unlocking of the housing panel 31 by the locking member 320a.

  In addition, the said latching means (locking member), a latch detection means, and a latch release detection means are not limited to the structure shown in FIGS. For example, the locking member is formed integrally with the main body of the lid 29 or the casing panel 31 using an elastic material having a predetermined elastic modulus (for example, a plate-shaped plastic material), and is slightly expanded outward when the casing panel 31 is mounted. Then, the claw portion at the tip may be fitted into the groove portion of the counterpart member (the lid portion main body or the casing panel). In this case, for example, a sensor that detects strain of the locking member made of the elastic material can be used as the locking detection means (lock release detection means). By detecting the strain generated in the locking member that locks the housing panel 31 attached to the main body of the lid 29 by this sensor, the locking of the housing panel 31 can be detected. Further, when the housing panel 31 is removed, the locking member is lowered until the strain of the locking member becomes substantially zero. Therefore, the unlocking of the housing panel 31 can be detected by detecting the decrease in the strain.

If the locking means (locking member) is not provided, instead of the locking detection means and the locking release detection means, a mounting detection means (mounting release detection means) for detecting the mounting of the housing panel 31. May be provided. In this case, for example, a movable member (for example, a cylinder) that is movable between a protruding position protruding from the surface portion and a retracted position retracted in the surface portion on the surface portion on which the housing panel 31 of the main body of the lid portion 29 is mounted. Shape pin member). The movable member is biased to a position protruding from the surface portion. And as the said mounting | wearing detection means, the sensor which detects the movement position of the said movable member can be used. When the housing panel 31 is attached to the main body of the lid portion 29, the movable member is pushed into the retracted position in the surface portion on the surface of the housing panel 31. By detecting the movement of the movable member to the retracted position with a sensor, it is possible to detect the mounting of the casing panel 31. Further, by detecting the movement of the movable member to the protruding position, it is possible to detect the release of the mounting of the housing panel 31, that is, the removal of the housing panel 31.
The mounting detection means (mounting release detection means) is provided at a position facing the peripheral end of the casing panel 31 in a state of being attached to the main body of the lid 29, and the peripheral end of the casing panel 31. A sensor that detects optically or magnetically may be used.

  FIG. 5A is a cross-sectional view showing an example of the configuration of the parasitic display unit 310 of the housing panel 31 in the mobile phone 20 of the present embodiment. The parasitic display unit 310 is formed using cholesteric liquid crystal, and is provided on the base member 322. The parasitic display unit 310 has a three-layer structure including a transparent lower base material layer 311, a cholesteric liquid crystal layer 312, and a transparent upper base material layer 313. As the transparent lower base material layer 311 and the transparent upper base material layer 313, for example, a glass thin plate can be used. A row electrode 314 as a lower grid electrode is provided on the upper side of the transparent lower base material layer 311, that is, on the outer side of the mobile phone 20, and on the lower side of the transparent upper base material layer 313, that is, on the inner side of the mobile phone 20 A column electrode 315 is provided as an upper grid electrode. The column electrode 314 is composed of a large number of line-shaped electrodes having a predetermined pitch extending in parallel with the horizontal direction of the mobile phone 20 (the horizontal direction in FIG. 1). It is connected to an output terminal of a drawing signal supply unit 330 as supply means. The column electrode 315 is composed of a large number of line-shaped electrodes with a predetermined pitch extending in parallel with the vertical direction (vertical direction in FIG. 1) of the mobile phone 20, and the end portions of these line-shaped electrodes are similarly drawn. It is connected to the output terminal of the signal supply unit 330. The row electrodes 314 and the column electrodes 315 are arranged so that the extending directions of the electrodes are orthogonal to each other over the entire display area of the parasitic display unit 310. Then, a drawing signal (electrical signal) is input to the row electrode 314 and the column electrode 315 at an appropriate ON / OFF timing from a drawing signal supply unit 330 described later, whereby the row electrode 314 and the column electrode at an arbitrary point in the display area. The potential difference with respect to 315 can be controlled.

  As shown in FIG. 5B, the cholesteric liquid crystal 312 selectively reflects light having a wavelength determined according to the helical period L of the molecular arrangement in the incident light, thereby enabling full color expression. Yes. Since the helical period L of the molecular arrangement generally becomes smaller as the temperature rises, a desired color can be expressed by temperature control. Also, the cholesteric liquid crystal 312 can fix the helical period L of the molecular arrangement by rapidly cooling. Therefore, after fixing the helical period L, the color can be fixed. Due to such characteristics, the parasitic display unit 310 using the cholesteric liquid crystal 312 consumes power to supply a drawing signal for temperature control when performing a drawing process for switching a display image. After being done, it is possible to continue displaying images without power.

  The parasitic display unit 310 capable of maintaining the image display state even in the parasitic state is not limited to cholesteric liquid crystal, and may be, for example, a ferroelectric liquid crystal.

  FIG. 6 is a cross-sectional view of the parasitic display unit 310 of the housing panel 31 according to another configuration example. The non-powered display unit 310 is provided on the base member 322 and has a four-layer structure including a transparent lower base material layer 316, an image recording layer 317, a transparent upper base material layer 318, and a protective layer 319. A row electrode 314 as a lower grid electrode is provided above the transparent lower base material layer 316, that is, outside the mobile phone 20, and below the transparent upper base material layer 318, that is, inside the mobile phone 20, A column electrode 315 is provided as an upper grid electrode. The row electrode 314 is composed of a large number of line-shaped electrodes having a predetermined pitch extending in parallel with the horizontal direction of the mobile phone 20 (the horizontal direction in FIG. 1), and ends of these line-shaped electrodes are drawn signal supply units. 330 is connected to the output terminal. The column electrode 315 is composed of a number of electric wires having a predetermined pitch extending in parallel to the vertical direction (vertical direction in FIG. 1) of the mobile phone 20, and the end portions of these line electrodes are similarly supplied with drawing signals. The output terminal of the unit 330 is connected. The row electrodes 314 and the column electrodes 315 are arranged so that the extending directions of the electrodes are orthogonal to each other over the entire display area parasitic display unit 310 of the parasitic display unit 310. A potential difference between the row electrode 314 and the column electrode 315 at an arbitrary point in the display area can be controlled by inputting a drawing signal (electrical signal) at an appropriate ON / OFF timing from the drawing signal supply unit 330.

  As the image recording layer 317, the visible state of the point can be controlled by a potential difference applied between the row electrode 314 and the column electrode 315, and an electric signal is input from the drawing signal supply unit 330. Even if it disappears, what can maintain the visible state can be used. For example, a large number of white particles and black particles are encapsulated in a transparent microcapsule and arranged at all points (pixel points) at which the electric wires of the row electrode 314 and the column electrode 315 intersect each other. The recording layer 317 can be used. In this case, the white particles and the black particles in each microcapsule are charged with opposite polarities. For example, a negatively charged substance is used as white particles, and a positively charged substance is used as black particles. When an electric signal is input from the drawing processing unit 200 and the potential of the row electrode 314 at a certain pixel point is negative and the potential of the column electrode 315 is positive, black particles are aligned in the microcapsules at that pixel point. Electrophoresis is performed on the electrode 315 side, and white particles are electrophoresed on the row electrode 314 side. As a result, when this pixel point is viewed from the outside of the mobile phone 20, the pixel point appears black. Conversely, pixel points when the potential of the row electrode 314 is positive and the potential of the column electrode 315 is negative appear white. By performing such drawing control over the entire display area, a desired monochrome image can be displayed in the display area. In addition, the arrangement of the black particles and the white particles in each microcapsule is maintained even when the electrical signal from the drawing signal supply unit 330 is no longer input. Accordingly, the non-powered display unit 310 of the casing panel 31 can maintain the once displayed image as it is even in the non-powered state. In addition, a multi-tone monochrome image can be displayed in accordance with an electrical signal input from the drawing signal supply unit 330.

  Although a monochrome image has been described here, a color image can also be displayed. As a specific example for displaying a color image, a color filter layer is provided between the transparent upper substrate layer 318 and the protective layer 319. When three color filters of R (red), G (green), and B (blue) are used as the color filter layer, three adjacent to each other among the points where the row electrode 314 and the column electrode 315 intersect each other. A point is treated as one pixel. Then, a color filter layer is provided so that the R, G, and B filter portions face each other at these three points. Thus, for example, when a certain pixel is red, white particles migrate to the column electrode 315 side for the microcapsules facing the R filter portion, and for the microcapsules facing the G filter portion and the B filter portion. A drawing signal (electric signal) is inputted so that the black particles are electrophoresed to the column electrode 315 side.

  Further, as the non-powered display unit 310 that can be used in the present invention, any display image can be used as long as the display image can be switched and the display state of the display image can be maintained even in the non-powered state. For example, other known electronic paper that can change the display image by receiving a drawing drive signal (electrical signal) for switching the display image and can maintain the display state of the image even in a non-powered state is used. Can do.

FIG. 7 is a block diagram showing a schematic configuration of an internal circuit of the casing panel 31 of the present embodiment. The casing panel 31 includes a drawing signal supply unit 330 as a drawing signal supply unit that supplies a drawing signal so as to display a desired image on the parasitic display unit 310 using the cholesteric liquid crystal or the like. The drawing signal supply unit 330 supplies a drawing drive signal (drive voltage) as a drawing signal to the display area of the non-powered display unit 310, and includes a drawing processing unit 331, a column electrode driving unit 332, and a row electrode driving unit. 333. The drawing processing unit 331 is based on various signals related to drawing such as image file data sent from the lid body side and drawing data of each pixel of the entire screen of the non-powered display unit 310, and the column electrode driving unit 332. And a drawing drive control signal to be supplied to the row electrode driver 333. The drawing processing unit 331 can be configured by an analog circuit or a digital circuit. The drawing processing unit 331 can also be configured by a small microcomputer including a CPU, RAM / ROM, and the like.
The column electrode driving unit 332 supplies a drawing drive signal to a predetermined column electrode 315 based on the column electrode drawing drive control signal received from the drawing processing unit 331. The row electrode drive unit 333 supplies a drawing drive signal to a predetermined row electrode 314 based on the row electrode drawing drive control signal received from the drawing processing unit 331.

  In addition, the drawing processing unit 331 of the drawing signal supply unit 330 has terminals (hereinafter referred to as “panel side electrodes”) of a plurality of panel side electrodes of the panel side electrode group 334 formed on the surface facing the lid side of the housing panel 31. Each terminal 334a, 334b, and 334c is connected. Among these plurality of panel-side electrode terminals, the panel-side electrode terminal 334a is an electrode that receives various drawing-related signals such as image file data, drawing data, a drawing command, and an image erasing command from the lid body side. The panel-side electrode terminal 334b is an electrode for receiving a power supply voltage / current supplied to an electric circuit such as the drawing processing unit 331. The panel side electrode terminal 334c is a ground electrode connected to the ground. The number of these panel-side electrode terminals is set according to the mode of transmission / reception of signals to / from the mobile phone body, and is not limited to the number in the figure.

FIG. 8 is a block diagram illustrating a schematic configuration of an internal circuit of the casing panel 31 according to another configuration example. The housing panel 31 includes an internal memory 335 as storage means for storing image data (image file data and drawing data) displayed on the non-powered display unit 310. The drawing processing unit 331 reads an image file or drawing data stored in the internal memory 335 based on a drawing command transmitted as a drawing-related signal from the lid body side, and the above-described column electrode driving unit 332 and A drawing drive control signal to be supplied to the row electrode driver 333 is generated.
The drawing processing unit 331 temporarily sends the image file data read from the internal memory 335 to the main body side, and based on the drawing data generated and sent back on the main body side, the above-described column electrode driving unit 332 and row You may make it produce | generate the drawing drive control signal supplied to the electrode drive part 333. FIG.

  FIG. 9 is a block diagram showing a schematic configuration of an internal circuit of a casing panel 31 according to still another configuration example. The housing panel 31 includes a sensor (hereinafter referred to as a “locking sensor”) 336 serving as a lock detection unit (lock release detection unit) that detects the rotation of the lock member 320a (see FIG. 4). ing. The drawing processing unit 331 can determine whether or not the housing panel 31 is locked by the locking member 320a and release of the locking based on the output of the locking sensor 336. When the drawing processing unit 331 determines that the casing panel 31 is locked, the drawing processing unit 331 generates a drawing drive control signal for drawing a predetermined image on the non-powered display unit 310, and the column electrode driving unit 332 and the row It supplies to the electrode drive part 333. On the other hand, when it is determined that the housing panel 31 is unlocked, a drawing drive control signal for erasing the image displayed on the parasitic display unit 310 is generated, and the column electrode drive unit 332 and the row electrode It supplies to the electrode drive part 333.

  FIG. 10 is a block diagram showing a main configuration of the main body of the mobile phone 20 according to the present embodiment. The mobile phone 20 includes a main control unit 210 as a control unit, an internal memory 211 as a storage unit, a wireless communication unit 212 and an antenna 213 as communication units that perform communication via a mobile phone communication network. Yes. The cellular phone 20 includes a sound signal processing unit 214, a display control unit 215, a key operation unit 216 as an operation unit, and a clock unit 217 as a time measurement unit. Further, the cellular phone 20 includes a sensor (hereinafter referred to as “engagement release detection unit”) as a detection unit for detecting the rotation of the communication interface unit 201 and the above-described locking members 291a and 291b (see FIG. 2). A stop sensor ”) 220.

  The main control unit 210 is composed of, for example, a CPU, a cache memory, a ROM, a system bus, and the like. By executing a predetermined control program, the main control unit 210 is connected to the internal memory 211, the wireless communication unit 212, the clock unit 216, and the like. To send and receive data and control each part. The main control unit 210 is connected to a microphone 26 as a sound input unit and a speaker 28 as a sound output unit via a sound signal processing unit 214, and a general power supply image display unit via a display control unit 215. A certain liquid crystal display 27 is connected. In addition, a key operation unit 216, a clock unit 217, a communication interface unit 201, and a locking sensor 220 are connected to the main control unit 210.

  The main control unit 210 controls the wireless communication unit 212, the internal memory 211, and the like so as to execute a predetermined communication process when making a call or sending / receiving mail with another mobile phone or the like. To do. The main control unit 210 performs data communication with a cellular phone communication network or a server on the Internet, and executes predetermined communication processing when downloading data of various contents or receiving distribution information. Thus, the wireless communication unit 212, the internal memory 211, and the like are controlled.

  The main control unit 210 can also function as a drawing data generation unit. In this case, the main control unit 210 creates drawing data corresponding to all the pixels on the screen of the housing panel 31 based on the image file downloaded by the user or the image file created by the mobile phone 20. The communication interface unit 201 converts the drawing data generated by the main control unit 210 into a predetermined signal format as a drawing-related signal and transmits it to the housing panel 31. Using the main control unit 210 and the communication interface unit 201, a signal used for supplying a drawing signal to the parasitic display unit 310 of the casing panel 31 is transmitted to the casing panel 31 via the terminal 294a of the main body side electrode. A signal transmission means is configured.

  Further, the main control unit 210 performs various drawing-related signals (image file data, drawing data, drawing data) for the housing panel 31 based on the detection result of the locking sensor 220 and the detection result of the electrode connection by the communication interface unit 201. Transmission of signals such as commands and image deletion commands).

The internal memory 211 is composed of a semiconductor memory such as a RAM or a ROM, for example, and stores a control program executed by the main control unit 210 and various data. The internal memory 211 is also used as content data storage means for storing content data such as images, music, and programs downloaded from information providing sites. Further, the internal memory 211 is also used as sound data storage means for storing sound data output from the speaker 109.
The internal memory 211 also stores image data storage means for storing display target image data (image file data) to be displayed on the housing panel 31 and the liquid crystal display 27, and the housing panel 31 and the liquid crystal display 27. It is also used as drawing data storage means for storing drawing data corresponding to all pixels on the screen.
As these storage means, instead of the internal memory 211, a storage medium such as a memory card or an IC card that can be attached to and detached from the mobile phone body may be used.

  The wireless communication unit 212 includes, for example, a modem, a synthesizer, a frequency converter, a high frequency amplifier, and the like, and communicates with various devices and servers or communicates with other mobile phones via a mobile phone communication network. Perform the process.

  The display control unit 215 controls to display an image on the display 27 based on the image data and drawing data sent from the main control unit 120.

  The speaker 28 receives an analog signal converted from a digital signal by the sound signal processing unit 214, and outputs a voice during a call, or outputs a mail ringing tone, a telephone ringing tone, music, or the like. The speaker 28 may be configured by separately providing a receiver speaker (receiver) for listening to voice during a call and an external output speaker for outputting a ring tone, music, or the like. You may comprise by one speaker so that the speaker for receivers and the speaker for external outputs may be combined.

  As shown in FIG. 1A, the key operation unit 216 includes a data input key (ten key, * key, # key) 21, a call start key 22, an end call key 23, a scroll key 24, a multi-function key 25, and the like. Consists of multiple keys. The key operation unit 216 is used when the user gives an instruction to start or end a call, menu selection, screen switching, etc., or inputs information, and the user displays an image displayed on the housing panel 31. It is also used as display image designation means for designating.

  The clock unit 217 counts accurate date and time and generates time information for update processing and the like. The microphone 26 converts the user's voice into an electrical signal (analog signal). An audio electrical signal (analog signal) output from the microphone 26 is input to the sound signal processing unit 214 and converted into a digital signal. The microphone 26 can be used to input voice used for normal telephone calls and videophone calls.

The mobile phone 20 has a plurality of main body side electrode terminals (hereinafter referred to as “main body side”) of the main body side electrode group 294 connected to the communication interface section 201 on the surface of the lid 29 on which the housing panel 31 of the main body is mounted. 294a, 294b, and 294c are provided. Of these plurality of main body side electrode terminals, the main body side electrode terminal 294a is an electrode that transmits various drawing-related signals such as image file data, drawing data, and drawing commands to the housing panel 31 side. In the example of FIG. 10, a signal composed of drawing data is transmitted. The main body side electrode terminal 294b is an electrode for supplying a power supply voltage / current supplied to an electric circuit in the housing panel 31. The main body side electrode terminal 294c is a ground electrode connected to the ground. In addition, the number of these main body side electrode terminals is set according to the mode of transmission / reception of signals to / from the housing panel 31, and is not limited to the number in the drawing.
The communication interface unit 201 also functions as an electrode connection detection unit that detects the connection between the body-side electrode terminal of the mobile phone body and the panel-side electrode terminal of the housing panel 31. For detection of this electrode connection, for example, energization between the main body side electrode terminal (power supply terminal) 294b and the panel side electrode terminal 334b, or between the main body side electrode terminal (ground terminal) 294c and the panel side electrode terminal 334c. Can be used.

Next, operation examples (operation examples 1 to 8) in the mobile phone 20 when the casing panel 31 is attached to the main body of the mobile phone 20 will be described.
[Operation example 1]
FIG. 11 is a flowchart showing an operation example of the cellular phone 20 when the casing panel 31 is attached to the main body of the cellular phone 20. In this operation example, the connection between the body side electrode terminal of the mobile phone body and the panel side electrode terminal of the housing panel 31 is detected, and an image is displayed on the housing panel 31 using image data stored in the mobile phone body. I'm drawing.
First, when the user mounts the casing panel 31 with the main power supply of the mobile phone 20 turned on, the mobile phone 20 is connected to the main body side electrode terminals 294a, b, c and the panel side electrode terminals of the housing panel 31. Connection (terminal energization) is detected (S101).
Next, when detecting the terminal energization, the cellular phone 20 determines whether image data (image file) for the housing panel 31 exists in a predetermined storage area of the internal memory 211 (S102). Here, if there is image data (image file) for the housing panel 31, the image data is read to generate drawing data for the chassis panel (S103).
Next, the cellular phone 20 transmits the generated drawing data to the chassis panel 31 as a drawing-related signal together with a drawing command (S104). The housing panel 31 supplies the predetermined image drawing signal to the non-powered display unit 310 based on a signal received from the main body of the mobile phone 20. Thereby, a predetermined image can be displayed on the casing panel 31 mounted on the mobile phone 20.
If there is no image data (image file) for the casing panel, an error message to that effect is displayed on the liquid crystal display 27 (S105).
If the drawing data for the housing panel 31 exists in the predetermined storage area of the internal memory 211, the drawing data read from the internal memory 211 is transmitted to the housing panel without performing the drawing data generation process. To do.

[Operation example 2]
FIG. 12 is a flowchart showing another operation example of the cellular phone 20 when the casing panel 31 is attached to the main body of the cellular phone 20. In this operation example, unlike the first operation example, drawing data is generated in the housing panel 31.
First, when the user mounts the casing panel 31 with the main power supply of the mobile phone 20 turned on, the mobile phone 20 is connected to the main body side electrode terminals 294a, b, c and the panel side electrode terminals of the housing panel 31. Connection (terminal energization) is detected (S201).
Next, when detecting the terminal energization, the cellular phone 20 determines whether image data (image file) for the housing panel 31 exists in a predetermined storage area of the internal memory 211 (S202). Here, if there is image data (image file) for the housing panel 31, the image data is read (S203). Then, the read image data is transmitted to the chassis panel 31 together with a drawing command (S204). The chassis panel 31 generates drawing data based on image data (image file) included in a signal received from the main body of the mobile phone 20. Then, based on the generated drawing data, the drawing signal of the predetermined image is supplied to the parasitic display unit 310. Thereby, a predetermined image can be displayed on the casing panel 31 mounted on the mobile phone 20.
If there is no image data (image file) for the casing panel, an error message to that effect is displayed on the liquid crystal display 27 (S205).

[Operation example 3]
FIG. 13 is a flowchart showing still another operation example of the cellular phone 20 when the casing panel 31 is attached to the main body of the cellular phone 20. In this operation example, the connection between the main body side electrode terminal of the mobile phone body and the panel side electrode terminal of the housing panel 31 is detected, and an image is stored on the housing panel 31 using image data stored in the housing panel 31. I'm drawing.
First, when the user mounts the casing panel 31 with the main power supply of the mobile phone 20 turned on, the mobile phone 20 is connected to the main body side electrode terminals 294a, b, c and the panel side electrode terminals of the housing panel 31. Connection (terminal energization) is detected (S301).
Next, when detecting the terminal energization, the mobile phone 20 determines whether image data (image file) for the housing panel 31 exists in a predetermined storage area of the internal memory 335 in the housing panel 31. (S302). Here, when there is image data (image file) for the housing panel 31, the image data is read out and temporarily stored in the work storage area of the internal memory 211 on the mobile phone body side (S303). Then, drawing data for the chassis panel is generated based on the image data (S304).
Next, the cellular phone 20 transmits the generated drawing data to the housing panel 31 as a drawing-related signal together with a drawing command (S305). The housing panel 31 supplies the predetermined image drawing signal to the non-powered display unit 310 based on a signal received from the main body of the mobile phone 20. Thereby, a predetermined image can be displayed on the casing panel 31 mounted on the mobile phone 20.
If there is no image data (image file) for the casing panel, an error message to that effect is displayed on the liquid crystal display 27 (S306).

[Operation Example 4]
FIG. 14 is a flowchart showing still another operation example of the cellular phone 20 when the casing panel 31 is attached to the main body of the cellular phone 20. In this operation example, unlike the operation example 3 described above, drawing data is generated in the housing panel 31.
First, when the user mounts the casing panel 31 with the main power supply of the mobile phone 20 turned on, the mobile phone 20 is connected to the main body side electrode terminals 294a, b, c and the panel side electrode terminals of the housing panel 31. Connection (terminal energization) is detected (S401).
Next, when detecting the terminal energization, the mobile phone 20 determines whether image data (image file) for the housing panel 31 exists in a predetermined storage area of the internal memory 335 in the housing panel 31. (S402). Here, when there is image data (image file) for the housing panel 31, a drawing command is transmitted to the chassis panel 31 (S403). The chassis panel 31 reads out image data (image file) from the internal memory 335 and generates drawing data. Then, based on the generated drawing data, the drawing signal of the predetermined image is supplied to the parasitic display unit 310. Thereby, a predetermined image can be displayed on the casing panel 31 mounted on the mobile phone 20.
If there is no image data (image file) for the casing panel, an error message to that effect is displayed on the liquid crystal display 27 (S404).
When drawing data for the housing panel 31 exists in a predetermined storage area of the internal memory 335 in the housing panel 31, the drawing data generation processing is not performed, and the drawing data read from the internal memory 335 is stored. The drawing signal is supplied to the non-powered display unit 310.

[Operation Example 5]
FIG. 15 is a flowchart showing still another operation example of the cellular phone 20 when the casing panel 31 is attached to the main body of the cellular phone 20. In this operation example, the locking of the housing panel 31 is detected, and an image is drawn on the housing panel 31 using image data stored in the mobile phone body.
First, the user mounts the casing panel 31 with the main power supply of the cellular phone 20 turned on, and operates the locking members 291a and 291b to lock the housing panel 31. Then, the cellular phone 20 detects the locking of the housing panel 31 by the locking members 291a and 291b by the locking sensor 220 (S501).
Next, when detecting the locking, the cellular phone 20 determines whether image data (image file) for the housing panel 31 exists in a predetermined storage area of the internal memory 211 (S502). Here, if there is image data (image file) for the housing panel 31, the image data is read to generate drawing data for the chassis panel (S503).
Next, the cellular phone 20 transmits the generated drawing data to the housing panel 31 as a drawing-related signal together with a drawing command (S504). The housing panel 31 supplies the predetermined image drawing signal to the non-powered display unit 310 based on a signal received from the main body of the mobile phone 20. Thereby, a predetermined image can be displayed on the casing panel 31 mounted on the mobile phone 20.
If there is no image data (image file) for the casing panel, an error message to that effect is displayed on the liquid crystal display 27 (S505).
If the drawing data for the housing panel 31 exists in the predetermined storage area of the internal memory 211, the drawing data read from the internal memory 211 is transmitted to the housing panel without performing the drawing data generation process. To do.

[Operation Example 6]
FIG. 16 is a flowchart showing still another operation example of the cellular phone 20 when the casing panel 31 is attached to the main body of the cellular phone 20. In this operation example, unlike the operation example 5 described above, drawing data is generated in the housing panel 31.
First, the user mounts the casing panel 31 with the main power supply of the cellular phone 20 turned on, and operates the locking members 291a and 291b to lock the housing panel 31. Then, the cellular phone 20 detects the locking of the housing panel 31 by the locking members 291a and 291b by the locking sensor 220 (S601).
Next, when detecting the locking, the mobile phone 20 determines whether image data (image file) for the housing panel 31 exists in a predetermined storage area of the internal memory 211 (S602). Here, when there is image data (image file) for the housing panel 31, the image data is read (S603). Then, the read image data is transmitted to the chassis panel 31 together with a drawing command (S604). The chassis panel 31 generates drawing data based on image data (image file) included in a signal received from the main body of the mobile phone 20. Then, based on the generated drawing data, the drawing signal of the predetermined image is supplied to the parasitic display unit 310. Thereby, a predetermined image can be displayed on the casing panel 31 mounted on the mobile phone 20.
If there is no image data (image file) for the casing panel, an error message to that effect is displayed on the liquid crystal display 27 (S605).

[Operation Example 7]
FIG. 17 is a flowchart showing still another operation example of the cellular phone 20 when the casing panel 31 is attached to the main body of the cellular phone 20. In this operation example, the locking of the casing panel 31 is detected, and an image is drawn on the casing panel 31 using image data stored in the casing panel 31.
First, the user mounts the casing panel 31 with the main power supply of the cellular phone 20 turned on, and operates the locking members 291a and 291b to lock the housing panel 31. Then, the cellular phone 20 detects the locking of the housing panel 31 by the locking members 291a and 291b by the locking sensor 220 (S701).
Next, when detecting the locking, the mobile phone 20 determines whether image data (image file) for the housing panel 31 exists in a predetermined storage area of the internal memory 335 in the housing panel 31. (S702). If image data (image file) for the housing panel 31 exists, the image data is read out and temporarily stored in the work storage area of the internal memory 211 on the mobile phone body side (S703). Then, drawing data for the chassis panel is generated based on the image data (S704).
Next, the cellular phone 20 transmits the generated drawing data together with a drawing command to the casing panel 31 as a drawing-related signal (S705). The housing panel 31 supplies the predetermined image drawing signal to the non-powered display unit 310 based on a signal received from the main body of the mobile phone 20. Thereby, a predetermined image can be displayed on the casing panel 31 mounted on the mobile phone 20.
If there is no image data (image file) for the casing panel, an error message to that effect is displayed on the liquid crystal display 27 (S706).

[Operation Example 8]
FIG. 18 is a flowchart showing still another operation example of the cellular phone 20 when the casing panel 31 is attached to the main body of the cellular phone 20. In this operation example, unlike the operation example 7 described above, drawing data is generated in the housing panel 31.
First, the user mounts the casing panel 31 with the main power supply of the cellular phone 20 turned on, and operates the locking members 291a and 291b to lock the housing panel 31. Then, the cellular phone 20 detects the locking of the housing panel 31 by the locking members 291a and 291b by the locking sensor 220 (S801).
Next, when detecting the locking, the mobile phone 20 determines whether image data (image file) for the housing panel 31 exists in a predetermined storage area of the internal memory 335 in the housing panel 31. (S802). Here, if there is image data (image file) for the housing panel 31, a drawing command is transmitted to the chassis panel 31 (S803). The chassis panel 31 reads out image data (image file) from the internal memory 335 and generates drawing data. Then, based on the generated drawing data, the drawing signal of the predetermined image is supplied to the parasitic display unit 310. Thereby, a predetermined image can be displayed on the casing panel 31 mounted on the mobile phone 20.
If there is no image data (image file) for the casing panel, an error message to that effect is displayed on the liquid crystal display 27 (S804).
When drawing data for the housing panel 31 exists in a predetermined storage area of the internal memory 335 in the housing panel 31, the drawing data generation processing is not performed, and the drawing data read from the internal memory 335 is stored. The drawing signal is supplied to the non-powered display unit 310.

Next, an operation example (operation example 9) in the mobile phone 20 when the casing panel 31 is removed from the main body of the mobile phone 20 will be described.
[Operation Example 9]
FIG. 19 is a flowchart of an operation example in the mobile phone 20 when the casing panel 31 is removed from the main body of the mobile phone 20. In this operation example, the unlocking of the housing panel 31 is detected, and the image on the housing panel 31 is erased.
First, the user operates the locking members 291a and 291b in a state where the main power supply of the mobile phone 20 is turned on to release the locking of the housing panel 31. Then, the cellular phone 20 detects the release of the locking of the housing panel 31 by the locking members 291a and 291b by the locking sensor 220 (S901).
Next, when detecting the release of the lock, the mobile phone 20 transmits an image erasing command to the housing panel 31 (S902). The housing panel 31 supplies the predetermined image erasure signal to the non-powered display unit 310 based on the image erasure command received from the mobile phone body. Thereby, the image displayed on the mobile phone 20 can be erased.

Next, an operation example (operation examples 10 to 12) in the housing panel 31 when the housing panel 31 is attached to the main body of the mobile phone 20 will be described.
[Operation Example 10]
FIG. 20 is a flowchart showing an operation example of the casing panel 31 when the casing panel 31 is attached to the main body of the mobile phone 20. In this operation example, the connection between the main body side electrode terminal of the mobile phone body and the panel side electrode terminal of the housing panel 31 is detected, and an image is stored on the housing panel 31 using image data stored in the housing panel 31. Is drawing.
First, when the user mounts the housing panel 31 with the main power supply of the mobile phone 20 turned on, the housing panel 31 is connected to the body-side electrode terminals 294a, b, c and the panel-side electrode terminals of the housing panel 31. Is detected (terminal energization) (S1001).
Next, upon detecting the terminal energization, the housing panel 31 determines whether image data (image file) for the housing panel 31 exists in a predetermined storage area of the internal memory 335 in the housing panel 31. Determination is made (S1002). If image data (image file) for the housing panel 31 exists, the image data is read to generate drawing data for the chassis panel (S1003).
Next, the housing panel 31 supplies the drawing signal of the predetermined image to the non-powered display unit 310 based on the generated drawing data (S1004). Thereby, a predetermined image can be displayed on the casing panel 31 mounted on the mobile phone 20.

[Operation Example 11]
FIG. 21 is a flowchart showing an operation example of the housing panel 31 when the housing panel 31 is attached to the main body of the mobile phone 20. In this operation example, unlike the operation example 10, the locking of the housing panel 31 is detected.
First, the user mounts the casing panel 31 with the main power source of the mobile phone 20 turned on, and operates the locking members 320a and 320b to lock the housing panel 31. Then, the cellular phone 20 detects the locking of the housing panel 31 by the locking members 320a and 320b by the locking sensor 336 (S1101).
Next, when the housing panel 31 detects the locking, whether or not image data (image file) for the housing panel 31 exists in a predetermined storage area of the internal memory 335 in the housing panel 31 is determined. Determination is made (S1102). If image data (image file) for the housing panel 31 exists, the image data is read to generate drawing data for the chassis panel (S1103).
Next, the housing panel 31 supplies the drawing signal of the predetermined image to the non-powered display unit 310 based on the generated drawing data (S1104). Thereby, a predetermined image can be displayed on the casing panel 31 mounted on the mobile phone 20.

  In the operation examples 10 and 11, when drawing data for the housing panel 31 exists in a predetermined storage area of the internal memory 335 in the housing panel 31, the drawing data generation processing is not performed and the internal data is not generated. A drawing signal is supplied to the parasitic display unit 310 using the drawing data read from the memory 335.

Next, an operation example (operation example 12) in the housing panel 31 when the casing panel 31 is removed from the main body of the mobile phone 20 will be described.
[Operation Example 12]
FIG. 22 is a flowchart of an operation example of the housing panel 31 when the casing panel 31 is removed from the main body of the mobile phone 20. In this operation example, the unlocking of the housing panel 31 is detected, and the image on the housing panel 31 is erased.
First, the user operates the locking members 320a and 320b in a state where the main power supply of the mobile phone 20 is turned on to release the locking of the housing panel 31. Then, the housing panel 31 detects the release of the locking of the housing panel 31 by the locking members 320a and 320b by the locking sensor 336 (S1201).
Next, when detecting the release of the lock, the housing panel 31 supplies a predetermined image erasure signal to the non-powered display unit 310 (S1202). Thereby, the image displayed on the mobile phone 20 can be erased.

In addition, the image displayed on the housing panel 31 in the above embodiment is not limited to the image mainly constituting the external appearance design as shown in FIG. For example, it may be an image displaying map information or text information as shown in FIG.
In the above embodiment, the cellular phone 20 has been described as an example. However, the present invention can be similarly applied to other mobile communication terminals and electronic devices such as portable devices.

(A) is a front view which shows an example of the external appearance of the mobile telephone which concerns on embodiment of this invention. (B) is a rear view of the mobile phone. (A)-(c) is sectional drawing which looked at the AA cross section of the cover part of the mobile telephone in FIG.1 (b) from the arrow direction. (A)-(c) is the elements on larger scale of the cover part of a mobile telephone. (A)-(c) is the elements on larger scale of the cover part of the mobile telephone concerning another structural example. (A) is sectional drawing which shows the example of 1 structure of the housing | casing panel in the mobile telephone of this embodiment. (B) is explanatory drawing which shows the operation principle of the housing | casing panel. Sectional drawing of the casing which shows the structure of the housing | casing panel which concerns on another structural example. The block diagram which shows schematic structure of the internal circuit of a housing panel. The block diagram which shows schematic structure of the internal circuit of the housing panel which concerns on another structural example. Furthermore, the block diagram which shows schematic structure of the internal circuit of the housing panel which concerns on another structural example. The block diagram which shows the main structures of the mobile telephone which concerns on this embodiment. The flowchart which shows the operation example in a mobile telephone when attaching a housing panel to the main body of a mobile telephone. The flowchart which shows the other operation example in a mobile telephone when mounting a housing panel in the main body of a mobile telephone. The flowchart which shows the further another operation example in a mobile telephone when attaching a housing panel to the main body of a mobile telephone. The flowchart which shows the further another operation example in a mobile telephone when attaching a housing panel to the main body of a mobile telephone. The flowchart which shows the further another operation example in a mobile telephone when attaching a housing panel to the main body of a mobile telephone. The flowchart which shows the further another operation example in a mobile telephone when attaching a housing panel to the main body of a mobile telephone. The flowchart which shows the further another operation example in a mobile telephone when attaching a housing panel to the main body of a mobile telephone. The flowchart which shows the further another operation example in a mobile telephone when attaching a housing panel to the main body of a mobile telephone. The flowchart which shows the operation example in a mobile telephone when removing a housing panel from the main body of a mobile telephone. The flowchart which shows the operation example in a housing | casing panel when mounting a housing panel in the main body of a mobile telephone. The flowchart which shows the other operation example in the housing | casing panel when mounting a housing panel in the main body of a mobile telephone. The flowchart which shows the further another operation example in the housing | casing panel when removing a housing panel from the main body of a mobile telephone. The external view of the mobile telephone which shows the other example of the image displayed on a housing | casing panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Cellular phone 29 Cover part 30 Main body part 31 Housing panel 201 Communication interface part 210 Main control part 211 Internal memory 220 Locking sensor 291a, 291b Locking member 292a, 292b Rotating shaft 293a Groove part 294a-294c Main body side electrode terminal 310 Parasitic display unit 311 Transparent lower substrate layer 312 Cholesteric liquid crystal layer 313 Transparent upper substrate layer 314 Column electrode 315 Row electrode 320a Locking member 321a Rotating shaft 322 Base member 330 Drawing signal supply unit 334a to 334c Main body side electrode terminal 335 Internal memory 360 Locking sensor

Claims (9)

A casing panel constituting at least a part of an outer surface portion of a casing in an electronic device,
Display means for drawing an image by receiving a supply of a drawing signal and maintaining the display state of the image even in a non-powered state;
A panel-side electrode provided corresponding to the body-side electrode of the body of the electronic device;
Drawing signal supply means for supplying a drawing signal to the display means based on a signal received from the body via the panel-side electrode when mounted on the body of the electronic device;
A housing panel configured to be detachable from a main body of the electronic device. The housing panel of claim 1,
Locking means for locking the casing panel mounted on the main body of the electronic device to the main body;
Locking detection means for detecting locking of the housing panel by the locking means,
The drawing signal supply means supplies a drawing signal to the display means when the locking of the casing panel mounted on the main body is detected based on the detection result of the locking detection means. A housing panel. The housing panel according to claim 1 or 2,
Locking means for locking the casing panel mounted on the main body of the electronic device to the main body;
A lock release detecting means for detecting the release of the lock;
An image erasure signal supply for supplying an image erasure signal for erasing an image displayed on the display means to the display means when the release of the lock is detected based on a detection result of the lock release detection means And a housing panel. In the housing panel of Claim 1, 2, or 3,
Storage means for storing data of an image displayed on the display means;
The housing panel characterized in that the drawing signal supply means supplies the display means with a drawing signal generated based on the image data read from the storage means. An electronic device including a housing panel that constitutes at least a part of the outer surface of the housing,
The housing panel has display means for drawing an image by receiving supply of a drawing signal and maintaining the display state of the image even in a non-powered state, and drawing signal supply means for supplying a drawing signal to the display means And
A body-side electrode provided corresponding to the panel-side electrode of the housing panel;
Signal transmitting means for transmitting a signal used for supplying a drawing signal to the display means to the casing panel via the body-side electrode when the casing panel is mounted on the main body of the electronic device;
An electronic device characterized in that the casing panel is detachable from a main body of the electronic device. The electronic device according to claim 5.
An electrode connection detecting means for detecting connection between the main body side electrode and the panel side electrode;
The signal transmitting means supplies a drawing signal to the display means when the connection between the panel side electrode of the housing panel and the body side electrode is detected based on the detection result of the electrode connection detecting means. An electronic apparatus characterized by transmitting a signal to be used to the housing panel. The electronic device according to claim 5.
Locking means for locking the casing panel mounted on the main body of the electronic device to the main body;
Locking detection means for detecting locking of the housing panel by the locking means,
The signal transmission means transmits a signal used to supply a drawing signal to the display means to the casing panel when the locking of the casing panel is detected based on the detection result of the locking detection means. An electronic device characterized by that. The electronic device according to claim 5, 6 or 7,
Locking means for locking the casing panel mounted on the main body of the electronic device to the main body;
A lock release detecting means for detecting the release of the lock,
The signal supply means transmits a signal used to supply an image erasing signal to the display means to the casing panel when the release of the lock is detected based on the detection result of the lock release detecting means. An electronic device characterized by that. The electronic device according to claim 5, 6, 7 or 8,
Storage means for storing data of an image displayed on the housing panel;
The electronic apparatus according to claim 1, wherein the signal supply unit transmits a signal used to supply a drawing signal to the display unit to the casing panel based on the image data read from the storage unit.

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